Nikon D7100 - Manual (Page 158)

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Wireless Remote Controllers
When the camera is used with optional WR-1 (0 309) and WR-R10/WR-T10 (0 309)
wireless remote controllers, the shutter-release buttons on the WR-1 and WR-T10
perform the same functions as the camera shutter-release button, allowing remote
continuous and self-timer photography.
WR-1 Wireless Remote Controllers
When a WR-1 is connected to the camera accessory terminal, the shutter can be
released using another WR-1.
WR-R10/WR-T10 Wireless Remote Controllers
When a WR-R10 (transceiver) is connected to the camera, the shutter can be released
using a WR-T10 (transmitter).
Pressing the shutter-release
button on the transmitter…
…releases the shutter on the
cameras connected to the receivers.
Pressing the shutter-release
button on the WR-T10
(transmitter)…
…releases the shutter on the
cameras connected to the
WR-R10 (transceivers).